I’ve also just purchased this lens, so may resurrect this thread a little.
So far I haven’t managed to do anything other than fire off a few quick test shots of boring targets...but I have used a few of those to start looking at callibrating the AF with the dock. I’ve only had about an hour at it so far (it’s a lengthy process), and only with a target at infinity, but the difference seems considerable.
Over the next few days (depending on availability of light and time), I’m intending to complete the process, and will post some before and after shots.